1388635 has 8 divisors (see below), whose sum is σ = 1676160. Its totient is φ = 1104384.

The previous prime is 1388633. The next prime is 1388641. The reversal of 1388635 is 5368831.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1388635 - 2¹ = 1388633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1388635.

It is not an unprimeable number, because it can be changed into a prime (1388633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246 + ... + 1684.

It is an arithmetic number, because the mean of its divisors is an integer number (209520).

2^1388635 is an apocalyptic number.

1388635 is a deficient number, since it is larger than the sum of its proper divisors (287525).

1388635 is a wasteful number, since it uses less digits than its factorization.

1388635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1637.

The product of its digits is 17280, while the sum is 34.

The square root of 1388635 is about 1178.4035811215. The cubic root of 1388635 is about 111.5653594692.

The spelling of 1388635 in words is "one million, three hundred eighty-eight thousand, six hundred thirty-five".